efficiency management study of bunker type receiver

International Journal of Advanced Research in ISSN: 2278-6236

Management and Social Sciences Impact Factor: 7.624

Vol. 10 | No. 11 | Nov 2021 www.garph.co.uk IJARMSS | 167

EFFICIENCY MANAGEMENT STUDY OF BUNKER TYPE RECEIVER

Jumaniyazov Qadam1,

Negmatov Basitxon Izzatillaevich2

1. t.f.d., prof. JSC "Scientific Center of Cotton Industry",

2. Namangan Institute of Engineering Technology.

ABSTRACT

It was studied that the effective operation of cotton receiving and transmitting devices

depends on the average density of transported cotton with the filling factor. It was found

that an increase in the density of transported cotton by 1 m3 will increase labor productivity

by 0.8-0.9 t / s, and an increase in the filling factor by 10% will increase labor productivity by

3.7-4.0 t / s. It was studied that the installation of a bunker on a receiving-transmitting

device is purposeful and that the control of bunker work efficiency is gravitational, force-

acting and combined. It was found that in the gravitational control of the work, the cotton is

transferred from the receiving bunker to the conveyor by its own movement, and under the

influence of force by means of blade drums, and the combined control involves two methods.

The equations were obtained taking into account the forces acting on the distortion of the

cotton shear on the control of work productivity by gravity, force and combined method.

Theoretical studies have shown that for a conveyor with a width of 800 mm to operate at a

working capacity of 30 t / s, its minimum speed must be 1.8 m / s. Research has shown that

it is necessary to use pile drums to break the cotton uniformly and transfer the required

amount to the conveyor belt. It was found that in order for pile drums to work effectively as

dosing devices, it is necessary to theoretically and practically study the operation of pile

drums in the form of dosing devices.

KEYWORDS: conveyor, bunker, truck, gravity, power, shear, pile drum, dispenser,

volume, cotton, work productivity.

The efficiency of complex mechanization depends on the interdependence of the

mechanisms and the state of the process of spinning cotton in the system, ie the state of

operation of the cart-receiver-transmission device-belt conveyors. The productivity of the

casting is determined by the performance of the belt conveyor, which is the last chain link in

the cotton receiving mechanization. The performance of the conveyor is determined using

the following formula [1].




vQQ (1)

vQ - volumetric productivity of the conveyor;

- Coefficient of filling of the conveyor belt;

- bulk density of cotton.

We can see from the formula that the efficiency of transporters in the reception and

transmission of cotton depends on the average density of cotton transported by the

coefficient of filling of cotton. The payout ratio is related to the change in work productivity

and the ratio of the actual material volume in the transport to the calculated payload

volume of the tarn. The increase in work productivity at the same parameters is due to the

high uniformity of the cotton in the stream and the maintenance of density.

As an example, the theoretical performance of the TLX-18 conveyor is shown in

Figure 1. The theoretical calculation of the productivity of the TLX-18 conveyor showed that

the working productivity of the unloaded cotton at a density of 40 kg / m3 and the height of

the scraper reaches 37 t / s. An increase in the density of transported cotton by 1 m3 will

increase labor productivity by 0.8-0.9 t / s, and a 10% increase in the filling factor will

increase labor productivity by 3.7-4.0 t / s. The design parameters of the TLX-18 can ensure

that the working productivity is 35-40 t / s and more at high uniformity and density of

cotton flow. All this is achieved through the choice of means and methods of performance

management of receiving and transmitting devices.




Figure 1. Dependence of TLX-18 conveyor productivity on cotton density and filling factor

Filling ratio

Wo

rk p

rodu

ctiv

ity

, t

/ s

Dimensional weight, kg /

m3

Wo

rk p

rodu

ctiv

ity

, t

/ s




To date, little attention has been paid to productivity management tools in the development

of new types of transceivers. The application of an existing local constructive technical

solution in work productivity management does not yield significantly positive results.

Therefore, there is a need to develop and conduct research on a new way to manage work

productivity [2].

The solution developed for mechanized collection of cotton from the transport cart shows

that the bunker should be installed on the receiving-unloading device. In general, the

performance management of a receiving-unloading device with a bunker can be done in the

following two different options:

- management of the cost of productivity of the receiving bunker;

- Simultaneous management of conveyor work efficiency and receiving bunker work

efficiency.

Bunker work productivity management can be gravitational, force-driven, and combined.

In gravity control of work, cotton is transferred from the receiving bunker to the conveyor

by its own movement. Under the influence of force, it is transmitted by means of drum

drums. Combined management involves two methods.

Gravity control of work efficiency is carried out on conveyors, elevators or other

mechanisms in which the cotton flow is inclined.

Bunker is a simple gravity method of productivity management. The size of the moving mass

is determined by the physico-mechanical properties of the cotton, the conditions of pouring

and the parameters of the receiving bunker.

The process of spontaneous decomposition of mass cotton takes place in a

fragmented state. The mass of cotton coming out of the receiving bunker is affected by its

own gravity (Fig. 2). The general distortion of the cotton is determined by the shear

deformation and the shear stress.

vStSG ni , н (2)

here - density of cotton, n / m3;

- shear stress, Pa;

S - cross-sectional area of cotton in the bunker, m2;

nt - time of crawling, s .;

v - conveyor speed, m / s.




The technological robustness of the gravitational process occurs when the mass of

cotton moves freely in the bunker in the control of work productivity and its internal

distortion during the unloading process is fully realized.

The minimum height of motion in gravity is expressed using the following equation:

0h (3)

here - relative deformation in shear;

0h - the maximum internal height of the drive, m.

Accounting 0h smaller than the height does not ensure complete excitation of the internal

structure of the cotton. This in turn causes congestion on the conveyor belt and you have to

use manual labor to clear the congestion. The smallest in terms of theoretical research 0h

height should not be less than 200 mm.

The speed mode of the conveyor depends on the driving mass of the cotton. The

loading process on the conveyor must be continuous. After passing the loading end point of

the conveyor conveyor, the next movement occurs at the end point of the receiving bunker.

For continuous operation of the conveyor, the time spent on the mass of cotton passing

through the conveyor must be equal to the time spent on moving the mass of cotton

collected in the bunker.

Figure 2. Scheme of gravity transfer of cotton

бk tt (4)




The time taken to move the harvested mass of cotton depends on the productivity of

the bunker, which is in the form of the following equation.

Q

Gt iб , c (5)

here Q - technical performance of the bunker, kg / h;

iG - drive mass, kg.

Taking into account the efficiency of the bunker, we express the mass of the

movement by the following equation:

бi tSvG (6)

From equations 2 and 6 we find the time taken to excite the mass of cotton

nб tv

t

, c (7)

For continuous operation of the conveyor, its speed is determined by the following

equation, taking into account the width of the bunker

б

кt

Bv , м/с (8)

here B - bunker width, m.

The above cases are true in the continuous movement of mass cotton. In practice,

gravitational motion depends on several factors that can be taken into account and not

taken into account. It is known that cotton delivered to cotton processing plants has

different physical and mechanical properties [3]. The main ones are its moisture and

density. The change in the shear characteristics of cotton can vary by 3 times, and by 1.6

times in terms of moisture. According to these figures, the process of moving the mass of

cotton on the conveyor belt changes. Therefore, high intermittent performance can be seen

in receiving-transmitting devices. Theoretically, it is possible to determine the required

performance of receiving-transmitting devices. The expected maximum operating capacity

of the conveyor per second is determined by the weight of the drive, and its non-uniformity

is determined in the following intervals:

iGQ 0 (9)

As mentioned above, the rational means that perform the best dosing function

include pile drums. Bunker flow control depends on the number of drums and their location,




which is carried out in the combined-gravity-forced method. Assume that when the cotton

layer is broken evenly with the pile drum, the layered cotton between the bottom of the

bunker and the drums falls under its own weight (Figure 3). In this case, the maximum

productivity in the mandatory and combined methods can be expressed by the following

equation:

vHvHQ 00max

(10)

1

1

max

n

iкб SvBnDQ

(11)

here кбD - pile drum diameter;

iS - cross-sectional area of layered cotton between drums;

n

- number of drums.

The fact that the bunker has the same working capacity is due to the change in the

height of the cotton layer in the bunker [4]. Theoretically, the expected change in

productivity in the mandatory and combined method will be in the following rang

vHSvHQvHn

i 0

1

1

00

(12)

Н

δ Н

Dδ

Dδ

hi

hi

hi

B0

v




Figure 3. The required amount of cotton with pile drums

homogeneous transmission scheme

According to this equation, the parameters of the conveyor are found.

The cotton thread is a prism with a certain size and cut. The size of the prism is

calculated by the following formula:

ТКSvW (13)

QW (14)

The cross-section geometry is related to the option of unloading the cotton on the

conveyor belt (Figure 4). The options differ in form. Cotton loaded flat on the conveyor

corresponds to a) cut, loaded in the center b), c) cut, loaded sideways - d), d) cut. In most

cases, the flat and side loading option can be seen on the receiving-transmitting device. The

geometry of the cotton flow section on the conveyor depends on the rotational speeds of

the pile drums. At high speed rotation of the drums, the cotton is scattered along the width

of the conveyor and the cut shape is close to the rectangular appearance. In the rotation of

the drums at low speed - in the form of a triangle or trapezoid. With this in mind, the

following equation is recommended to calculate the conveyor parameters of the receiving

device:

10

2

0

2BB

B

QvТК , м/с (15)

Where 0B - conveyor width, m;

1B - tarnov height, m;

- density of cotton, kg / m3;

Q - bunker capacity, kg / h;

ТКv - conveyor speed, m / s.




Figure 4 Cutting forms of cotton flow on the conveyor

The results of theoretical studies show that a conveyor with a width of 800 mm has a

minimum speed of 1.8 m / s to operate at a working capacity of 30 t / s.

Research shows that pile drums are capable of uniformly breaking down massive cotton.

However, the technological robustness and uniformity of production depends on the design

of the drums and the efficiency of the work. In this case, pile drums should act as dosing

devices. This, in turn, requires first a theoretical study, and then a practical study of how pile

drums work in the form of dispensers.

REFERENCES

1. B.I.Negmatov, Q. Jumaniyazov, G.O. Qodirova, I.A. Muhammadjonova. Preparation of

cotton raw material and analysis of its acceptance and delivery mechanisms. Turkish journal

of Computer and Mathematics Education. Vol.12 No.13 (2021), 3353-3357.

2. G.O. Qadirova, B.I.Negmatov, R.M. Muradov. Study of ways to determine pollution and

defects affecting cotton field quality and length. European journal of Agricultural and Rural

Education. https // www.scholarzest.com Vol.12 No.7, July 2021, ISNN: 2660-5643.




3. Negmatov B.I., Kadirova G.O. Brief analysis of the study in the field of study of physical

and mechanical properties of cotton wool. Universum: technical sciences. Moscow 2021.-C.

-21-23.

4. Salimov A.M., Lugachev A.E., Khodjiev M.T. Technology pervichnoy obrabotki cotton.

"Sparks of Literature." Tashkent. 2018. -184 p.

5. Kurbonova Oyshakhon Bakhodir kizi Zhuraev Khurshidbek Abdurakhmanovich

Mirzobakhrom Karimovich Negmatov Water exchange mode in swimming pools with return

water supply system // EPRA International Journal of Multidisciplinary Research (IJMR).

Vol.7 No.4 (2021),136- 140.

6. M.K. Negmatov, Zhuraev K.A., Yuldashev M.A. Treatment of Sewage Water of Electrical

Production on Recycled Filters // International Journal of Advanced Research in Science,

Engineering and Technology. Vol.6 No.10 (2019), 11132- 11135.

efficiency management study of bunker type receiver

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